Valve



Sept. 14, 1948. J; A. RQSMAIT VALVE 2 Sheets-Sheet 1 Filed Aug. 28, 1944 HTTOJPNE'YS.

J. A. ROSMAIT 4 2,449;l45

Sept. 14, 1948.

VALVE 2 Sheets Sheet 2 Filed Aug. 28, 1944 HIM HIIII I) w ll HI IIHH Patented Sept. 14, 1948 UNITED STATES EA'EENT QFFEQE VALVE John A; llosniait, Appleton, Wit sq assignor to D. J. Murray Manufacturing 00., Wausau, Wis., a corporation of Wisconsin Application August 28, 1944, Serial'Na. 5511495 2 Claims.

'Lne'present invention relates in general to innin Ci'tainiilduStries, and especian in tlie pa p'er manufacturing industry, there is frequent demand fora relatively large capactiy low pressuregate valve of the flanged type capable of contiollirlgj the new of liquids such as fluent paper and pulp stockcontaiiiingmore or less solid mat ter in suspension. Such a valve is especially desirable for the purpose of sealing the suction side of an axial flow pulp stock pump associated with a r'e'servoi'r filled with the fibre bearing stock, when it becomesnec ssary to work on the pump or the circulating system; and the available space for a valve in such a combination of elements is usually exceedingly limited. These valves besides temgcompact, must referably be of light but durable construction, as well as being relatively inexpnsive'and readily operable; andthey' should also be adapted to thoroughly seal the passages in which they are located, in spite of themesence of considerable solid matte'r in the liquid. Great strength and lightness are also requisite in this type of valve because stresses and strains resultingfrom excessive weight and pressure, will cause deflections which result in valve and pump operating difiiculties; and these valves should also be as simple as possible in order to insure continued satisfactory operation and low manufacturing cost. While many attempts have here-- tofore been made to produce a satisfactory gate valve adapted to meet these various requirements and conditions, none of these prior valves have proven entirely successful in accomplishing the desired results. l

It is therefore an object of the present invention to provide an improved gate valve assemblage which in fact does meet all of the above mentioned requirements, and which may also be readily constructed, assemblied, and dismantled.

some of the more specific objects and advan*- tages of present invention, are as follows:

To provide a light and durable gate valve of relatively large capacity, which is so compact that it may be installed within minimum space measured in the direction of now, as well as in compara-tiy'ely cramped quarters;

To provide, an. exceedingly strong, but sun-p1 fled gate valve assemblage which will, effectively resiststrains andstresses to which it maybe subjected, and which is also easily manipulable. at.

To provide a valve assemblage which will not, clog due to. the presence of heavy fluids such as fibrous pulp, and which may be closed tightly in spite of the presence of considerable. sol-id matter in the liquid.

To provide gate valve interchangeable with similar parts of like valve. assemblages, and which may be expeditiously manufactured at moderatecost.

These and other specific objects and advantages willbe apparent from the following detailed description.

A clear conception of the features constituting my present improvement, and of the mode of constructing and of operating gate valves embodying the invention, may be had by referring to the drawings accompanying and forming a partof this specification: wherein like reference charac'ters designate the same or similar par-ts in the various views. v

Fig. 1 is a central vertical section through one of the improved gate valves, taken transversely of the direction of flow of liquid therethrough, and'sshowing the valve disc closedin solid "lines, a'ndopen in'dot-and dash lines; 1

lg. 2 is a central vertical section through. the. same gate valve, taken longitudinally of thedi rection of liquid flow, the valve disc being closed;

Fig. 3 is an end view of the assembled gate.- valve looking in the direction of flow of liquid therethrough, the operating lever and linkage having been omitted;

Fig. 4 is an enlarged irregular transverse sectioh through the upper portion of the valve disc,

the lower portion of the actuating stem, and the lower semircircular casing, the section having,

been taken along the line li -5 4 of Fig. 1;

Fig. 5 is a transverse section through the gate valve assemblage taken between the lower and intermediate sectionsof the body, along the line 5 5 of Fig. 1;

Fig. 6 is, another transverse section through the gate valve taken between the intermediate and structure the various parts of which are of simplified constructionand' upper body sections, along the line 6-43 of Fig. 1;

Fig. '7 is an enlarged fragmentary section through the periphery of the gate valve disc, taken along the radial line I-'I of Fig. 1;

Fig. 8 is another similarly enlarged section through the periphery of the valve disc, taken along the radial line 8-8 of Fig. 1; and

Fig. 9 is a section similar to that of Fig. 1, taken through a modified construction of the lower semi-circular casing or body section.

While the invention has been shown and described herein as having been embodied in a typical fibrous pulp flow control gate valve especially adapted for use in the paper making industry, it is not my desire or intent to unnecessarily restrict the scope or utility of the improved features, and it is to be understood that these valves may be furnished in various sizes and of diverse capacities.

Referring especially to Figs. 1 to 8 inclusive,

has plane opposite faces 21 adapted to snugly engage the opposite sides of a semi-circular recess 28 formed in the lower casing I2 adjoining the passage II, when the valve is closed. The lowermost portion of the casing recess 28 is provided with stop lugs 29 for preventing the disc I5 from seating on the bottom of the recess 28, and the lower part of the valve disc I5 has a series of ports 30 formed therein for connecting the interior of the recess 28 with the discharge end of the passage II whenever the gate valve is closed, as depicted in Figs. 1, 2, 4, 5 and 8. The medial opposite portions of the valve disc I 5 are also provided with integral guiding projections 3| which are snugly but slidably cooperable with rectilinear parallel guiding grooves 32 formed Within and extending throughout the length of the intermethe typical gate valve assemblage shown therein,

comprises in general a hollow main body I I] having a circular through passage II therein for accommodating the flow of liquid, and consisting of a lower section or semi-circular casing l2, an intermediate section or valve disc guiding and receiving casing I3, and an upper section or cap casing I4; a flat valve plate or approximately circular disc I5 slidable within the body casings I2, I3, I4 from the solid line to the dot-and-dash line positions of Fig. 1 and vice versa; an elongated actuating stem I6 for the disc I5 penetrating the upper cap casing I4; and a manipulating lever I'I for the stem I6 coacting with the medial casing I3 through a connecting link I8.

The three body sections or casings I2, I8, I4 may be formed of durable metal castings, and the lower and intermediate casings I2, I3 are normally firmly but detachably connected by means of bolts I9, while the intermediate and upper sections I3, I4 are likewise detachably connected by means of studs 20 and nuts coacting therewith, as shown in Fig. 3. The lower semi-circular casing I2 bounds approximately one-half of the circular passage I I and is provided with parallel laterally spaced and outwardly directed inte ral attaching flan es 2i each having a series of bolt holes 22 therein and which are firmly interconnected byintegral ribs 23 radiating from the passage I I and disposed between the successive holes 22. The intermediate guiding casing I3 which bounds the other half of the passa e II is also provided with comp ementary semi-circular laterally spaced p rallel integral end flan es 24 which merge with the adjacent casing walls and each of wh ch is provided w th two bolt holes 22 and with a series of threaded stud receiving'sockets 25 at the zones of emergency into the walls. When the casin s I2. I3 are united, the outer adjoining faces of the flanges 2|, 24 lie in parallel planes which are spaced apart only sufficient distance to provide requisite strength and to accommodate the movable valve disc I 5, thereby permitting insertion of the valve body In withinspaces of minimum width. 7

The valve plate or disc I5 which is housed within the hollow body I0, may also be formed of durable metal in any suitable manner, and should be only of suflicient thickness to properly resist the pressures to which it may be subjected during normal use, in order to permit reduction of the distance between the opposite casing flanges 2|, 24 to a minimum. The periphery of the major lower portion of the valve disc I5 is provided with a groove 26 as shown in Figs, 2, 4, '7 and. 8, and

diate casing I3, and these guide grooves 32 are tangent to and are alined with the opposite ends of the semi-circular recess 28 of the lower casing I2 when the body I0 is assembled. The uppermost central portion of the valve disc I5 is slidably confined between spaced opposite guiding surfaces or ridges 33 of the intermediate casing I 3, and is also provided with partially cylindrical concentric socket surfaces 34, 35 forming a stem attaching socket, see Figs. 1, 2, 4 and 6.

The upper body cap casing I4 which normally closes the upper ends of the disc guiding grooves 32 of the medial casing I 3, is providedwith a central bore 35 and a packing 31' with which the cylindrical valve actuating stem I 6 is slidably cooperable, and the lower portion of this stem I 6 is provided with a two-diameter flat head 38 adapted for snug confinement within the valve socket formed by the surfaces 34, 35. The actuating stem I6 also has sliding coaction with the intermediate casing 13 between the guide ridges 33 as indicated in Fig. 6, and the flat valve disc I5 may be rotated into operative position upon the stem head 38 and is most effectively guided during normal movement thereof, both by the guide grooves 32 and by the ridges 33 which also pre-- vent the stem head 38 from becoming detached from thevalved-isc. By virtue of the re-eniorced and sturdy construction of the body casings I2,

actuating lever IT and a link I 8 associated directly with the gate valve unit. The manipulating lever I? may be pivotally attached to the upper outer end of the actuating stem I6 by means of a pivot bolt 39, and the end of this lever Il may be connected to the upper extremity of the connecting link I8 by a fulcrum pin '49. The lower end of the swinging link I8 may be swingably attached to cars 4I formed integral with the medial casing I 3, by means of a pivot pin 42; and the bolt 38 and pins 48, 42 may be readily applied and removed. With the aid of this manipulating mechanism, the valve disc I5 may obviously be moved in either direction at will; without subjecting the stem I6 to undesirable side thrust.

Although the construction of the lower casing I2 shown in Figs. 1, 2 and 4 is entirely satisfactory, it may be desirable in some cases to modify valve assemblage.

this casing structure as. shown in Fig. 9. In this modification the semi-circular lower casing I2 is provided with external parallel flanges 2|, bolt holes 22, and with an internal semi-circular recess 23 as in Figs. 1 and 3, but the radial ribs 23 have been replaced by radial bosses 43 surrounding someof the bolt holes 22 and integrally uniting the spaced parallel flanges 25. Both of the. lower casings i2, i2...may be. readily machined in 'complementary pairs, by fastening two of these semicircular casings. together after initially finishing the uppermost fiat diametrical surfaces; thereof, whereupon the two united casings may be finally machined simultaneously on. a lathe or the like. The cap casing i l may likewise be readily machined on a lathe or the like, and the lower and upper end surfaces of the medial casing is may.

be faced in a lathe while the rectilinear guide. slots 32 may be dressed on a shaper or the like.

When the improved gate valve unit has been properly constructed and assembled as hereinabove described, the valve disc i5 may be raised and lowered with greatest ease, and the attaching flanges 2!, 2d of the body 68 may obviously be inserted within extremely narrow limits of confinement. When the valve is closed, the space provided by the recess 28 will permit tight seating of the valve even if solid matter is deposited within this recess, and the grooves provided in the projections 3! as well as the ports 3%, will permit escape of confined liquid and. solid matter from within the groove 23. The opposite side surfaces 2'! of the disc i5 will insure tight sealing, and these surfaces also cooperate with the guide grooves 32 and with the guide ridges 353 during opening of the valve. When the valve disc l5 has been elevated as illustrated in dotand-dash lines in Fig. l, the passage i i is entirely free from obstruction, but the disc is may obviously be set so as to more or less close the passage H. The stem it; is obviously thoroughly guided and can be readily applied to or detached from the valve disc l5, and when the stem and disc have been assembled, the intermediate casing I3 will retain the parts in assembled condition. The A manipulating lever i'l also serves to prevent possible rotation of the stem it after the valve disc and stem have been assembled, and the link l8 eliminates possible side thrust on the valve stem ES during opening and closing movements.

The various features of improvement involved in the construction of the gate valve, are of ex treme importance in reducing the cost thereof to a minimum, in making the valve suitable for various uses, and in prolonging the life of the The construction of the body iii and the internal parts which are normally housed within the body, so that the body may be disposed between adjacent members located closely adjacent to each other, is very important especially in connection with paper manufacturing installations. The reinforcing ribs 23 or bosses 43 cast integra1 with the flanges 2i and spaced about the clamping bolt holes 22, provide a rigid support for resisting compression of the body and resultant distortion and reduction of clearances. The formation of the guide grooves 32 for the valve disc [5, and the maintenance of de sirable clearances, permits the valve disc i5 to slide freely in the grooves even after the valve assemblage has been clamped in final position. The construction of the valve body it! of three coacting casings i2, it, Hi and. the splitting of the lower portion of the body on a diametral plane, facilitates machining of the parts and accurate 6 formation of the grooves andrecesses with which the valve disc l5 cooperates. The sectional formation of thebody I 0 also permits convenient machining of the stem guiding grooves and bores, in accurate alinement with the central plane of the valve disc l5, and the provision of the parallel guide ridges 33 in addition to the guide grooves 32, insures most efiective guiding of the valve disc i5 during its opening and closing movements. The improved construction of the stem head 38 and the mode of attaching the same to the valve disc 15, also permits convenient assembling and dismantling of these parts and provides some flexib lity in the connection between the stem and disc. The method of constructing the semicircular lower casings l2, l2, also facilitates machinin'g'of these casings in pairs, and the lugs 25 prevent th valve disc l5 from seating in the bottomlof the semi-circular recess 28. The relief ports 38cooperate'with the groovetii in the valve discib and with the recess 28 in the lower casing 92, sons to provide-escape passages for the solid material and liquid during closing of the valve, and thereby positively prevent entrapment of solids and compression thereof beneath the valve disc when closing. These various features obviously cooperate to provide an extremely simple and durable valve assemblage which may be readily assembled or dismantled and which is highly effective in normal use.

From the foregoing detailed description it will be apparent that my present invention provides an improvedgate valve assemblage which besides being simple, compact and durable in construction, is highly effective in operation and flexible in its adaptations, and which may also be installed in extremely confined quarters. The improved valve structure is thoroughly reinforced against possible deflection and is therefore easily operable at all times with minimum effort, and the valve can obviously be either fully opened or closed, or partially opened. All parts of the improved assemblage can obviously be quickly and accurately machined so as to permit manufacture of the improved valves at relatively moderate cost. While the improved valve assemblage is especially adapted for use in connection with fibrous pulp handling systems, it may obviously be utilized for many other purposes, and the improved valves may be manufactured in various sizes and capacities.

It should be understood that it is not desired to limit the present invention to the exact details of construction or to the precise mode of operation, herein shown and described, for various modifications within the scope of the appended claims may occur to persons skilled in the art,

I claim:

1. In a gate valve, a body having a through passage and parallel guiding grooves extending tangentially away from said passage, a flat valve disc having opposite guide projections slidably engaging said grooves and also having a T-shaped open sided socket therein between said guide projections, said valve disc being of approximately uniform thickness throughout its entire area, an actuating stem for said disc having a T-shaped head of like thickness snugly confined within and insertable through an open side of said socket and also having a portion beyond said head of greater thickness than said valve, and parallel guide ridges on said body coacting directly with said stem head and said valve disc to retain the head within said socket and also forming guide retangentially away from diametrically opposite 5 portions of the passage, a fiat valve disc of approximately uniform thickness throughout its entire area having integral opposite guide projections slidably engaging said grooves and also having a T-shaped open sided socket therein mid- Way between said guiding grooves, an actuating stem for said disc having a flat T-shaped head of like thickness snugly confined within said socket and also having a major cylindrical portion of greater diameter than said thickness of the valve 15 and head, and parallel guide ridges formed on said body parallel to said grooves and coacting directly with said stem head and said valve disc to retain the head within said socket, said ridges also forming guide recesses coacting with the adjacent enlarged portion of said stem.

JOHN A. ROSMAIT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 207,365 Morse Aug. 27, 1878 534,360 Collins Feb. 19, 1895 594,634 Lunken Nov. 30, 1897 759,448 Kiser May 10, 1904 838,479 Tromblee Dec. 11, 1906 1,918,430 Schlotmann July 18, 1933 2,208,180 Delleani July 16, 1940 FOREIGN PATENTS Number Country Date 144,531 Germany Sept; 21, 1903 752,036

France July 3, 1933 

